Default dragging is much slower than published sim

[zepumph]

I think a lot of what was being talked about in #319 has to do with how different the dragging speed is from https://phet.colorado.edu/sims/html/friction/latest/friction_en.html. I think there was a regression for how the speed works in KeyboardDragListener.

[zepumph]

Tagging @jessegreenberg

[jessegreenberg]

Sorry about that. I can't dig in too deeply but I think phetsims/scenery#1437 could have done this. Not entirely sure.

[zepumph]

No worries! I found values I liked that are almost identical to the published version using the new options. Closing